In our experience, all physical systems eventually tend toward equilibrium: where entropy is maximized and no further energy can be extracted from it. This seems like an inevitable consequence of the second law of thermodynamics, and is absolute for any closed-and-isolated system. But our Universe is neither closed nor isolated, as it began from a hot and dense state and has been cooling, expanding, and clumping ever since the hot Big Bang. Even though its entropy has increased dramatically,... Read this story
